Looking very nice!

If you use SS rectifiers and a full wave bridge, you don't need the center tap, but you will need a much lower voltage transformer. You can simulate it pretty closely, The Duncan Amps power supply designer is pretty easy to use and if you specify things using actual values, it's pretty darn close. http://www.duncanamps.com/psud2/index.html This is also really helpful, Hammond's rectifier design guide. It shows solid state diode, but the principles are the same. Mostly the full wave and full wave bridge. A typical vacuum tube rectifier is full wave, that uses the center tap. Totally applicable with SS, but going to full wave bridge with the same trans will give a lot more output voltage, as in nearly double. If you already have the transformer, you can go with SS, center tapped full wave, but your voltage will still be higher, the diodes drop much less voltage than a tube. https://www.hammfg.com/electronics/transformers/rectifier?referer=968

Looks really nice. I did a copper top plate for a preamp many moons ago, I think they look really classy.

Ugh, if so, the lack of a magnetic gap would do exactly that.

That looks great, really nice work!

Thanks. From 2013, these are two phono stages, one retailing for $10k and the other a $79 Boozhound Labs kit using JFET's and a LiPo battery. Shortly after I supplied the measurements to the manufacturer, he purchased some appropriate test gear and in the years since, it's become a much better product. At the time I was horrified someone could be selling such an expensive product without knowing how it actually performed, especially in the noise department, which is, of course paramount with a phono stage. I still use the BHL phono stage in my upstairs system. I did have to build a new power supply this year, I forgot to shut it off and nuked the batteries. I think it sounds even better now. These are just screen shots of the analyzer, same setup for both.